Chromic salts of dithiocarbamic acids



United States Patent CHRONIIC SALTS OF DITHIOCARBAMIC ACIDS Harold E. Bruner, Akron, Ohio, assignor to Monsanto Chemical Company, St. Louis, Mo., a corporation of Delaware No Drawing. Original application June 17, "1953, Serial No. 362,423. Divided and this application March 16, 1956, Serial No. 571,902

1 Claim. (Cl. 260-438) Chromic salts of dithiocarbamic acids have been reported as unobtainable by admixing aqueous solutions of a soluble chromic salt and a soluble salt of the dithiocarbamic acid. Quantitative formation of chromic hydroxide takes place. However, it was found that the addition to water of a mixture of a soluble chromic salt and sodium dimethyl dithiocarbamate resulted in precipitation of chromic dimethyl dithiocarbamate. 51.3 parts by weight of sodium dimethyl dithiocarbamate were ground with 39.2 parts by weight of hydrated chromic sulfate. The latter contained approximately 10 moles of water of crystallization. The mixture was added to 700 parts by weight of water containing a small amount of sodium 2,909,546 Patented Oct. 20, 1959 dodecyl benzene sulfonate. On stirring the solution gradually changed color from dark green to blue and a finely divided precipitate formed. The solids were removed by filtration, washed with water and dried. There was obtained 29.4 parts by weight of a light blue powder which contained chromic dimethyl dithiocarbamate by analysis. The dry product can be dispersed in water References Cited in the file of this patent UNITED STATES PATENTS Olin et al Dec. 27, 1949 Pike et a1 Dec. 15, 1953 OTHER REFERENCES Chem. Abstracts, vol. 34, cols. 5354-5366. 

